NAB

I've got myself confussed with what petrol to put in my IS 250 SE MM - Automatic! I have had it for a couple of weeks and just put standard unleaded (95 RON) in it. However, have read a coupe of sites (and the manual) it looks like I should put premium unleaded (98 RON) in it. Is it necessary or worthwhile to use premium unleaded?

I have picked up a IS 250 SEL MM (09 plate) a couple of days ago; very happy with it. I have a load of questions, but my first two are:

Is it possible to configure the locking mechanism so that when I open the drivers door all doors are unlocked?

Is it possible to configure the lights so that they stay on for 30 seconds after the car is locked?

Without having to take it to a Lexus gargage.